This is a universally administered unicast address with a registered vendor prefix.
MAC addressEC:9F:0D:57:FF:FF
OUIEC:9F:0D
Vendor address18125 N Ramsey Rd Rathdrum ID US 83858-8288
Block rangeEC:9F:0D:50:00:00– EC:9F:0D:5F:FF:FF
Address capacity1,048,576
TransmissionUnicast: addressed to a single device
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
RandomizationNot randomized
Derived modified EUI-64EE:9F:0D:FF:FE:57:FF:FF
Possible IPv6 link-local derivationfe80::ee9f:dff:fe57:ffff

The EUI-64 and IPv6 link-local fields are a mathematical derivation from this MAC address. They don't confirm the device currently uses that IPv6 address.

Have a list, not just one address? Paste it and extract every MAC address in it →

New to MAC addresses? What they are and how they're structured →